Update: The band released a statement to the Las Vegas Review-Journal which stated, "Joey had a minor accident and is totally fine, but he hurt his shoulder in the process so he won’t be playing tomorrow." That would take him out of tonight's show (April 26) as well.

Aerosmith have yet to publicly address the drummer's absence, but this isn't the first time Kramer has taken a break from performing. In 2014, the musician suffered a heart ailment that forced the band to cancel a gig. The following week, Kramer's son, Jesse Kramer, substituted on the drum throne in place of his father.

This time around, Aerosmith fans are holding out hope that Kramer's health isn't involved in the unexpected absence. On Twitter, one shared a clip of last night's performance with the fill-in drummer, noting that "John Douglas played all the show. That's why I'm asking what happened with [Kramer]." See it below.